diff options
Diffstat (limited to 'tools/apbuild/relaytool.m4')
| -rw-r--r-- | tools/apbuild/relaytool.m4 | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/tools/apbuild/relaytool.m4 b/tools/apbuild/relaytool.m4 new file mode 100644 index 00000000..f8f20f98 --- /dev/null +++ b/tools/apbuild/relaytool.m4 @@ -0,0 +1,28 @@ +dnl Usage: RELAYTOOL(LIBRARY_NAME, LIBS, CFLAGS, ACTION-IF-WEAK-LINK-IS-POSSIBLE) + +dnl Example: +dnl RELAYTOOL("gtkspell", GTKSPELL_LIBS, GTKSPELL_CFLAGS, gtkspell_weak=yes) +dnl Will modify GTKSPELL_LIBS to include a call to relaytool if available +dnl or if not, will modify GTKSPELL_CFLAGS to include -D switches to define +dnl libgtkspell_is_present=1 and libgtkspell_symbol_is_present=1 + +AC_DEFUN([RELAYTOOL], [ + if test -z "$RELAYTOOL_PROG"; then + AC_PATH_PROG(RELAYTOOL_PROG, relaytool, no) + fi + + AC_MSG_CHECKING(whether we can weak link $1) + + _RELAYTOOL_PROCESSED_NAME=`echo "$1" | sed 's/-/_/g;s/\./_/g;'` + _RELAYTOOL_UPPER_NAME=`echo $_RELAYTOOL_PROCESSED_NAME | tr '[[:lower:]]' '[[:upper:]]'` + + if test "$RELAYTOOL_PROG" = "no"; then + AC_MSG_RESULT(no) + $3="-DRELAYTOOL_${_RELAYTOOL_UPPER_NAME}='static const int lib${_RELAYTOOL_PROCESSED_NAME}_is_present = 1; static int __attribute__((unused)) lib${_RELAYTOOL_PROCESSED_NAME}_symbol_is_present(char *m) { return 1; }' $$3" + else + AC_MSG_RESULT(yes) + $2="-Wl,--gc-sections \`relaytool --relay $1 $$2\`" + $3="-DRELAYTOOL_${_RELAYTOOL_UPPER_NAME}='extern int lib${_RELAYTOOL_PROCESSED_NAME}_is_present; extern int lib${_RELAYTOOL_PROCESSED_NAME}_symbol_is_present(char *s);' $$3" + $4 + fi +]) |